Experimental and numerical studies on a bubble-induced inverse gas-liquid-solids fluidized bed

Yunfeng Liu, Xiliang Sun, Zeneng Sun, Chao Zhang, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

1 Citation (Scopus)

Abstract

Hydrodynamics in a newly invented bubble-induced inverse gas–liquid-solids three-phase fluidized bed has been studied via both experimental and numerical methods. With experiments in a 3.0 m column of 0.153 m in diameter, four fluidization regimes including a fixed bed regime, a bed expansion regime, a complete fluidization regime, and a freeboard regime have been identified with the increase in the superficial gas velocity. A three-phase Eulerian-Eulerian CFD model was developed to simulate the hydrodynamics in the inverse three-phase fluidized bed and the simulation results have a good agreement with the experimental data. The effects of the particle property and solids loading on the transitions across the flow regimes were numerically studied. A higher solids loading and/or a larger particle density are reported to contribute to an easier fluidization and a faster flow development to the complete fluidization regime. The radial flow structure becomes less uniform with increased inner circulation of the liquid after introducing more bubbles into the column.

Original languageEnglish
Pages (from-to)4496-4508
Number of pages13
JournalAdvanced Powder Technology
Volume32
Issue number12
DOIs
Publication statusPublished - Dec 2021
Externally publishedYes

Keywords

  • Bubble-induced, three-phase fluidized bed
  • Flow regime
  • Gas–liquid-solids fluidized bed
  • Inverse fluidization

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Mechanics of Materials

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